4 stories high including where the workers slept4 stories high including where the workers slept 11 stories high from the keel to the boat deck. 9 stories high from the waterline to the boat deck.
The RMS Titanic had 10 decks; Boat Deck A-deck B-deck C-deck D-deck E-deck F-deck G-deck Orlop Deck Tank TopCheck out the related link below to take a look on the floor plans of Titanic.